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You need to calculate the total volume of the space that the concrete has to fill.

if you're doing a slab 4" thick a cu. yd. will cover 81 sq. ft. Take the total area

and divide by 81 to get the number of yard needed.

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13y ago
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12y ago

calculate the volume of concrete you need to pour and multiply the volume with concrete density (2400kg/Cu.m), then you will get the total weight of the conctere. then the weight of concrete divided by the total ratio (for eg. M20 mix, 1:1.5:3, total ratio is 5.5)you will get 1 part cement weight (in kg) and then 1 part multiplied by 1.5 for fine aggregate and 1 part weight multiplied by 3 for coarse aggregate.

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12y ago

You have measure ratio of cement sand and aggregate

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10y ago

Calculating the actual req.of concrete for work + 2% for wastage in pump, pipe line, cube casting .

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Q: How do you calculate the wastage in concrete?
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